As illustrated in this figure, which of the following is NOT potential trigger for slope failure?
A. undercutting of steep slopes by roads and rivers
B. shaking during an earthquake
C. precipitation that can saturate and weaken sediment
D. shaking of slopes and melting of snow during volcanic eruptions
E. All of these are potential triggers for slope failure.
Answer: E
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Which statement least characterizes laboratory research?
a. It allows measurement of model ecosystems and populations under controlled conditions. b. It is faster than similar field research. c. It is less costly than similar field research. d. It has been used to develop most of our knowledge about ecosystems. e. It has supplemented field research since the 1960's.
Ozone:
A) absorbs ultraviolet light. B) typically reaches its greatest concentrations near the ground and near major cities. C) is very difficult to split into diatomic oxygen and monatomic oxygen. D) exists primarily in the troposphere.
Liquefied natural gas is formed
A. on the surface of oil deposits. B. by volatilizing hydrocarbons in gasoline. C. by subjecting natural gas to -162°C. D. None of these are correct.
Which of the following bodies of water is growing due to tectonic movement?
A. Indian Ocean B. Black Sea C. Pacific Ocean D. Atlantic Ocean E. None of these are growing